哌嗪

The purpose of this paper is to synthesize some phosphonium salts with PPh3 and some chiral quaternary ammonium salts with L-Valine. And we also use L-Valine and L-Phe-OMe to synthesize a new type catalyst —2,5-diketopiperazine , the simplest compound of cyclo-peptide.

本文利用廉价易得的三苯基磷和手性L-缬氨酸作为起始原料，合成了几种普通季鏻盐和手性季铵盐，并且利用L-缬氨酸与L-苯丙氨酸甲酯反应，合成了一种新型的相转移催化剂——2，5-二酮哌嗪环类的化合物。

Piperazine can be used in children from 3 months but needs to be taken in 2 doses, 2 weeks apart.

哌嗪，可用于儿童从3个月内，但需要采取在2剂， 2周，除了。

Objective To establish a method of RP-HPLC for determination of piperazine ferulate in urine.

目的 建立尿液中阿魏酸哌嗪含量的测定方法。

The paper has reviewed physical and chemical properties, production status and related uses of piperazine.

本文简要介绍了无水哌嗪的物理化学性质、生产状况以及相关用途。

Effects of Elemene Piperazine on apoptosis and cell cycle of HeLa cells were evaluated by flow cytometric method.

结果榄香烯哌嗪对HeLa、HepG2、SGC-7901及Bel-7402细胞有较强的体外增殖抑制作用。

To provided the theoretic basis and experimental base with industrialized production of piperazine.

本文为哌嗪的工业化生产提供了理论依据和实验基础。

Methods Effects of Elemene Piperazine on the growth of tumor cells were evaluated by SRB.

方法采用SRB法考察榄香烯哌嗪对多种人癌细胞体外增殖的抑制作用。

Mix 25 mg of piperazine citrate with 10 gm of flake food, and feeding this to the fish for 5-10 days.

混合25毫克的哌嗪柠檬酸与10基因改造片状的食物，和喂养，这鱼为5-10天。

The paper has reviewed the market development and related uses of piperazine.

中文摘要：本文首先简要介绍了无水哌嗪的市场发展情况以及相关用途。

The concentration of piperazine ferulate in urine can be determined sensitively and accurately by RP-HPLC.

该方法能灵敏、准确的测定尿液中阿魏酸哌嗪的含量。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。